Colloque café - scientifique

Animé par Marlene Nahrgang

jeudi 1 octobre 2020 à 13:45

Amphi PASCAL

Probing new physics with Coherent Elastic Neutrino-Nucleus Scattering and the future Ricochet experiment

Julien Billard

IPNL

Neutrinos continue to be a source of scientific wonder in nuclear physics, particle physics, and cosmology. Although much has been learned about the properties of neutrinos, much still pleads for more experimental investigation. The measurement of Coherent Elastic Neutrino-Nucleus Scattering (CENNS) has been a holy grail in neutrino physics since its prediction almost 40 years ago, and has now become a burgeoning field of research following its recent discovery by the COHERENT collaboration in July 2017. Following this first detection, the future Ricochet experiment aims at searching for new physics in the electroweak sector by providing the first low-energy and high-precision measurement of CENNS down to the O(10) eV energy-scale, where new physics signatures may arise. These include for instance the existence of sterile neutrinos and of new mediators, that could be related to the DM problem, and the possibility of Non Standard Interactions that would have tremendous implications on the global neutrino physics program. To that end, the collaboration is building a kg-scale cryogenic detector array, combining two target materials: Ge-semiconductor and Zn-superconducting metal, both aiming for O(10) eV energy thresholds with unparalleled background rejection capabilities, that will be deployed at the ILL nuclear reactor within the future Ricochet experiment. This talk will review the science reach of the future Ricochet neutrino experiment at ILL as well as the ongoing R&D efforts dedicated to the construction of the CryoCube (Ge target) detector array.

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